摘要循证医学（Evidence Based Medicine）是20世纪90年代在临床实践中迅速发展并受到广泛关注的一门新兴学科和医学模式。2000年David Sachett将循证医学的定义修订为：＂慎重、准确和明智地应用当前所能获得的最佳研究证据,同时结合医生的个人专业技能和多年临床经验,考虑患者的价值和愿望,将三者完善地结合起来,制定出患者的治疗方案＂[1]。
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